I thought a solenoid was in effect a relay many had a manual button (black rubber push button) When the ignition key or starter button is activated the current runs through a coil (electromagnet) which closes a much beefier switch to carry the high current to the starter motor. The only reason I can see the need for a relay is for switching on or more likely cutting power to other high current devices (headlights heater fan wipers etc) during the starting process to give maximum power to the starter motor. Do lights etc go out when starting through the relay and not if bypassed?
But a Morgan wiring expert would be able to answer better. The fact that the solenoid is pulsating (or I suspect buzzing) would mean it is not getting enough power through the relay. Just a thought Brian Moderator Pixham From: Paul Fileman [mailto:[email protected]] Sent: 01 August 2012 09:37 To: mogtalk2 Subject: Re: [mogtalk2] Moss Box +8 starter Am I correct in thinking that these solenoids have two windings - 1 to operate and 1 to hold? Last time I worked on one, it was a BL 1500 diesel in a Narrow Boat in the 70's so memory problems may be present. Kind Regards, Paul Paul Fileman +44 7969 188820 Sent from a wireless device. On 1 Aug 2012, at 09:30, Martyn J Culling <[email protected]> wrote: My initial thought is the solenoid will be designed to operate on the kind of current a starter switch provides. Certainly that is true of all the cars I've worked on, not just the 4/4. Has he a part number for the solenoid? One might be able to find the electrical characteristics on the web, in particular the operating current of the solenoid and see if this is reasonable for a switch. A relay as well as a solenoid doesn't sound a very Morgan thing to do, especially at that time. My 2p says we're looking at an owner modification. rgds Martyn On Aug 1 2012, Brian Cowell wrote: A fellow SpotMogger with a Moss Box +8 has a problem with the starter solenoid pulsating. It works properly with a direct electrical feed. There is a relay between the starter switch and the solenoid. The solenoid also works if the relay is bypassed. As you might expect, the relay output lead is thicker than its input lead. He asked me if the relay could be dispensed with. I pointed out that the starter switch may then suffer from carrying too much current. Any thoughts anyone? Cheers, Brian of SpotMog ------------------------------------------- View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] Modify Your Subscription: https://www.listbox.com/member/? <https://www.listbox.com/member/?&;> & Powered by Listbox: http://www.listbox.com View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ <https://www.listbox.com/member/?&;> Modify Your Subscription <http://www.listbox.com> View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ <https://www.listbox.com/member/?&;> Modify Your Subscription <http://www.listbox.com> ------------------------------------------- View posts on The Mail Archive http://www.mail-archive.com/[email protected]/ [http://www.mail-archive.com/[email protected]/] Modify Your Subscription: https://www.listbox.com/member/?member_id=22459785&id_secret=22459785-4a39ddf8 Powered by Listbox: http://www.listbox.com
